Writing instrument



FIG. 1 is a perspective view of a writing instrument showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right-side view thereof, with the left-side view being a mirror image thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view of a writing instrument showing a second embodiment of my new design;

FIG. 8 is a front view thereof;

FIG. 9 is a right-side view thereof, with the left-side view being a mirror image thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a top view thereof;

FIG. 12 is a bottom view thereof;

FIG. 13 is a perspective view of a writing instrument showing a third embodiment of my new design;

FIG. 14 is a front view thereof;

FIG. 15 is a right-side view thereof, with the left-side view being a mirror image thereof;

FIG. 16 is a rear view thereof;

FIG. 17 is a top view thereof; and,

FIG. 18 is a bottom view thereof. 

The ornamental design for a writing instrument, as shown and described. 